3com S7906E Manuel De Montage

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Super VLAN Configuration 
When configuring super VLAN, go to these sections for information you are interested in: 
  
 
 
Overview 
Super VLAN, also called VLAN aggregation, was introduced to save the IP address space.  
A super VLAN is associated with multiple sub-VLANs. You can create a VLAN interface for a super 
VLAN and assign an IP address for the VLAN interface. However, you cannot create a VLAN interface 
for a sub-VLAN. You cannot assign a physical port to a super VLAN, however, you can assign a physical 
port to a sub-VLAN. All ports of a sub-VLAN use the VLAN interface IP address of the associated super 
VLAN. Packets cannot be forwarded between sub-VLANs at Layer 2.  
To enable Layer 3 communication between sub-VLANs, you should configure the VLAN interface IP 
address of the associated super VLAN as the gateway IP address. This enables multiple sub-VLANs to 
share the same gateway address and thus saves IP address resources. 
After creating a super VLAN and the VLAN interface, enable local proxy Address Resolution Protocol 
(ARP) on the device. The super VLAN can use local proxy ARP to forward and process ARP requests 
and responses and thus achieve Layer 3 communication between sub-VLANs and between sub-VLANs 
and other networks. 
Configuring a Super VLAN 
Follow these steps to configure a super VLAN: 
To do… 
Use the command… 
Remarks 
Enter system view 
system-view 
— 
Enter VLAN view 
vlan vlan-id 
Required 
If the specified VLAN does not 
exist, this command creates the 
VLAN first. 
Configure the VLAN as a super 
VLAN 
supervlan 
Required 
Associate the super VLAN with 
the specified sub-VLAN(s) 
subvlan vlan-list 
Required 
Exit the VLAN view 
quit 
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